Zonal communication and methods of evaluating zonal communication

Abstract

Methods may include recording pressure and/or temperature data at two or more time points in a region adjacent an isolated zone in a wellbore created by one or more isolation devices; and determining the degree of fluid communication around the one or more isolation devices from characteristic changes in the recorded pressure and/or temperature data. Methods may also include injecting a fluid into an isolated zone in a wellbore created by one or more isolation devices; recording pressure and/or temperature data at two or more time points in a region adjacent the isolated zone; and determining the degree of fluid communication around the one or more isolation devices from characteristic changes in the recorded pressure and/or temperature data.

What is claimed is: 
     
         1 . A method comprising:
 recording pressure and/or temperature data at two or more time points in a region adjacent an isolated zone in a wellbore created by one or more isolation devices; and   determining the degree of fluid communication around the one or more isolation devices from characteristic changes in the recorded pressure and/or temperature data.   
     
     
         2 . The method of  claim 1 , further comprising preparing a wellbore treatment to modify the determined degree of fluid communication around the one or more isolation devices. 
     
     
         3 . The method of  claim 1 , wherein the recorded pressure and/or temperature data is transmitted to the surface by one or more selected form a group consisting of pressure pulses, i-coil, and fiber optics. 
     
     
         4 . The method of  claim 1 , wherein the recorded pressure and/or temperature data is transmitted in real time. 
     
     
         5 . The method of  claim 1 , wherein pressure data is recorded and wherein a decrease in pressure over time is indicative of minimal fluid communication outside of the isolated zone. 
     
     
         6 . The method of  claim 1 , wherein pressure data is recorded and wherein an increase in pressure over time is indicative of fluid communication outside of the isolated zone. 
     
     
         7 . The method of  claim 1 , wherein temperature is recorded and wherein an increase in temperature over time is indicative of minimal fluid communication outside of the isolated zone. 
     
     
         8 . The method of  claim 1 , wherein temperature is recorded and wherein a decrease in temperature over time is indicative of fluid communication outside of the isolated zone. 
     
     
         9 . The method of  claim 1 , wherein recording pressure and/or temperature data is performed using a memory gauge. 
     
     
         10 . The method of  claim 1 , wherein recording pressure and/or temperature data is performed during stimulation of the isolated zone. 
     
     
         11 . The method of  claim 1 , wherein recording pressure and/or temperature data is performed during production of the isolated zone. 
     
     
         12 . A method comprising:
 injecting a fluid into an isolated zone in a wellbore created by one or more isolation devices;   recording pressure and/or temperature data at two or more time points in a region adjacent the isolated zone; and   determining the degree of fluid communication around the one or more isolation devices from characteristic changes in the recorded pressure and/or temperature data.   
     
     
         13 . The method of  claim 12 , wherein the injected fluid is a stimulating treatment. 
     
     
         14 . The method of  claim 12 , further comprising preparing a wellbore treatment to modify the determined degree of fluid communication around the one or more isolation devices. 
     
     
         15 . The method of  claim 12 , wherein pressure data is recorded and wherein a decrease in pressure over time is indicative of minimal fluid communication outside of the isolated zone. 
     
     
         16 . The method of  claim 12 , wherein pressure data is recorded and wherein an increase in pressure over time is indicative of fluid communication outside of the isolated zone. 
     
     
         17 . The method of  claim 16 , wherein the increase in pressure is characterized as a pressure differential in the range of 100 psi to 5000 psi. 
     
     
         18 . The method of  claim 12 , wherein temperature is recorded and wherein an increase in temperature over time is indicative of minimal fluid communication outside of the isolated zone. 
     
     
         19 . The method of  claim 12 , wherein temperature is recorded and wherein a decrease in temperature over time is indicative of fluid communication outside of the isolated zone. 
     
     
         20 . The method of claim  22 , wherein the decrease in temperature is characterized as a pressure differential in the range of 2° C. to 100° C.